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Article Publish Status: FREE
Abstract Title:

Radiotherapy using IMRT boosts after hyperbaric oxygen therapy with chemotherapy for glioblastoma.

Abstract Source:

J Radiat Res. 2016 Nov 17. Epub 2016 Nov 17. PMID: 27864508

Abstract Author(s):

Katsuya Yahara, Takayuki Ohguri, Hiroki Udono, Junkoh Yamamoto, Kyosuke Tomura, Toshihiro Onoda, Hajime Imada, Shigeru Nishizawa, Yukunori Korogi

Article Affiliation:

Katsuya Yahara

Abstract:

The purpose of this study was to evaluate the feasibility and efficacy of radiotherapy (RT) using intensity-modulated radiotherapy (IMRT) boosts after hyperbaric oxygen (HBO) therapy with chemotherapy in patients with glioblastoma. Twenty-four patients with glioblastoma were treated with the combined therapy, which was RT using IMRT boosts after HBO with chemotherapy, and were retrospectively analyzed. The RT protocol was as follows: first, 3D conformal RT [40 Gy/20 fractions (fr)] was delivered to the gross tumor volume (GTV) and the surrounding edema, including an additional 1.5-2.0 cm. The IMRT boost doses were then continuously delivered to the GTV plus 5 mm (28 Gy/8 fr) and the surrounding edema (16 Gy/8 fr). Each IMRT boost session was performed immediately after HBO to achieve radiosensitization. The planned RT dose was completed in all patients, while HBO therapy was terminated in one patient (4%) due to Grade 2 aural pain. The toxicities were mild, no non-hematological toxicity of Grade 3-5 was observed. The 2-year overall survival (OS) and progression-free survival rates in all patients were 46.5% and 35.4%, respectively. The median OS time was 22.1 months. In conclusion, the combined therapy of RT using IMRT boosts after HBO with chemotherapy was a feasible and promising treatment modality for patients with glioblastoma. The results justify further evaluation to clarify the benefits of this therapy.

Study Type : Human Study

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Sayer Ji
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